I have added space to the cloud but my iPhone won't back up to cloud what do I need to do to get it to back up automatically

Hello Usdog,

Thank you for reaching out to Apple Support Communities.

We were able to find these helpful steps to guide you:

"If your iCloud backup is taking longer than expected to complete

1. In iOS or iPadOS, go to Settings > Wi-Fi. Check that you're connected to Wi-Fi. 
2. Check your upload speed.
3. Leave your device connected to power and Wi-Fi for 24 hours. If your backup still isn't done, archive important data then contact Apple Support."

Additional details and steps can be found here: If you can't back up to iCloud

If the issue persists, can you provide a few more details? Have you tested on other networks? Also, what is your exact iOS version?

Cheers!

My iCloud isn’t backup what did I need to do